CTWM is a highly-configurable window manager based
on the classic TWM window manager. It supports
xpms, multiple workspaces, advanced icon
managment, animated icons and backgrounds, 3D
titles and borders, etc. It offers rudimentary
Gnome support and is backwards-compatible with TWM.

Wmconfig is a text-based menu generation tool for
various X window managers for desktops. Toolkits
like Qt or Gtk are not required. It uses a simple
configuration layout and the configuration may be
edited with a text editor.

fvwm-xdg-menu is an xdg application menu with full support for the additional freedesktop categories. It was developed with fvwm in mind, but provides an xdg compliant application menu infrastructure and should therefore work with any xdg compliant desktop or window manager.

The WMdock plugin is a compatibility layer for
running WindowMaker dockapps on the XFCE desktop.
It integrates the dockapps into a panel, closely
resembling the look and feel of the WindowMaker
dock or clip.

dvtm brings the concept of tiling window
management, popularized by X11-window managers
like dwm, to the console. As a console window
manager, it tries to make it easy to work with
multiple console based programs like vim, mutt,
cmus, or irssi. dvtm is intended to be used where
X11 isn't available or over SSH. In conjunction
with dtach, it can be seen as a lightweight
alternative to GNU screen.

FVWM-Crystal aims to create an easy to use, pretty, but also powerful desktop environment for Linux or other Unix-like operating systems. It uses the following programs: FVWM as a window manager and "main core"; different ways to provide icons on the desktop including support for many file managers and custom commands; xterm, aterm, mrxvt, or urxvt as terminal emulators; MPD or XMMS2 as music players (there's built-in support for controlling these programs), and several other tools for different functions, like setting a wallpaper or taking screenshots.

spectrwm is a minimalistic tiling window manager that tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. It has sane defaults and does not require one to learn a language to do any configuration. It was written by hackers for hackers and it strives to be small, compact, and fast.

FVWM-min is a minimal standard configuration for FVWM which provides a sane and functional set of window manager defaults. It configures FVWM to a very clean and functional state, then gets out of your way so you can do your work. The basic idea is that after installation, it should be usable enough for you to start productive work in it immediately. Styles are included for customizing the look, and are applied with a small shell script.